Varigated Hindu Rope Hoya
I am new to this site but I hope you can help me. I've bought my several hoyas over the years and they all grow beautifully in his office so I bought my daughter the Hindu rope. I planted them all in Pro-mix from my local green house. They are all in offices in the same building, same floor, and same exposure but the rope has grown very little - it will grow a leaf or two and they they'll fall off. I've changed the soil, tried it under lights, and checked it for creepy crawlers - all to no avail!
What do I do now?